Module blob 

The compiled geometry encoding.

One blob holds one connected polygon component: an exterior ring and its holes, as 1e-6-degree integer coordinates, delta-encoded and zigzag-varint packed, with ring closure implicit.

Working in fixed-point integers is what makes the boundary rule exact. A point on a boundary counts as inside, everywhere, and deciding that with floating-point coordinates would mean choosing an epsilon and hoping three implementations chose the same one.

Structs

Ring

One closed ring, without its repeated closing vertex.

Enums

GeometryError

A malformed or unsupported geometry blob.

Constants

COORD_SCALE

Coordinate units per degree.

GEOMETRY_FORMAT_VERSION

Version of the blob layout this reader understands.

RING_EXTERIOR

The role a ring plays in its polygon.

RING_HOLE

A hole cut out of the exterior.

Functions

decode

Decode one polygon component.

from_e6

Convert a stored coordinate back to degrees.

point_in_rings

Exact integer point-in-polygon, boundary inclusive.

to_e6

Quantize a degree value onto the storage grid, rounding half away from zero.